I have a Hobby Zone Super Cub I bought from a guy that never opened the package.I put the plane together and was taxing it around and gettting use to the controls.i bought a simulator and have been practising up my skills.It was a calm day today so I thought I would try the plane out for the first time flying.I put the controler on and nothing happens.I replaced the batteries with brand new ones and recharged the battery for the plane and it still won't fire up.What could the problem be.It was working fine taxing it around a few times and has never flown.I took the wing off and all the wires look good.Is there a switch on the plane I don't know about or does anyone have a idea what to do next??? Thanks for your help in advance. Dale

That means when you left your battery hooked up the speed control wore your battery down. "Defo" I believe means, definatly it is your battery. You will need another battery to power your plane now. Most likely you have discharged it way to far to recover and it is easier to replace than try to fix.
Conehead
Orrin Eldred

If your new to the whole Lipo battery thing...If you discharge the battery too low, the battery becomes a throw away. I learned this the hard way with my first SuperCub when I got it stuck in a tree after low voltage cutoff and I kept trying to use the power of the motor to dislodge it. After coming back and cutting it down...The battery would not charge back up.

Lipo batteries are a great source of power for RC planes, but people time how long their flights are and most planes come with a low voltage cutoff which allows the servos to still work and land the plane when the battery is too low. With the SuperCub, you can override the low voltage cutoff by turning the throttle off and then back on and so on.

So, If you took the battery too low and then kept re arming it, you eventually took too much (mah) out of the battery and it is probably shot. Your local hobby store probably can check it, but it's probably garbage. Also, you can get batteries for that plane for $10-$15 if you do your homework online.

I suggest you bookmark this site and read the appropriate sections before you buy another battery. Then you'll be at least mildly prepared to handle the mess of opinons you get when you ask the next questions:
What is the best lipo?
What is the best charger?